Steam boiler



July 29, 1941. c. z ALEXANDER STEAM BOILER Filed sept. 1, 19:59

2 Sheets-Sheet 1 I I il l I I I I l I ATTORNEY July 29, 1941. c. z.ALEXANDER STEAM oILER Filed sept. 1, 1939 2 Shets-Sheet 2 INVENTORM2771? ATTRNEY Patented July 29, 194i UNITED STATES PATENT OFFICE STEAMBOILER Carl Z. Alexander, Springfield, N. J.

Application September 1, 1939, Serial No. 293,039

5 Claims.

'This invention relates to an improved steam boiler that combines thepercolator principle in addition to the normal heating function of theboiler sections.

The invention provides a compact boiler with convenient and efcientfeeding and blow-off connections. The boiler is of a construction thatmakes it possible to use cast or sheet-metal sections, the latter beingpreferred.

The invention is illustrated in the accompanying drawings in whichFigure 1 is a longitudinal vertical section of the improved boiler.Figure 2 is a section on line 2-2 in Figure 1. Figure 3 is a section online 3-3 in Figure 1. Figure 4 is a perspective View with the casingbroken away to more clearly show the construction and the iire passages.

The boiler is encased in an outer shell or casing I which is lined witha heat resisting material shown at I I.

The boiler comprises sections, the bottom one being spaced from thefloor by a supporting frame I2 and is raised to provide a re-box I3 intowhich the oil burner I4 projects the llame for heating the boiler. Otherforms of fuel, can, of course, be used with the usual alterationsnecessary for such use.

The boiler sections are arranged horizontal, spaced apart, and disposedone above the other. They are so constructed as to be duplicates, eachbeing reversed end to end relative to the next adjacent section orsections. The boiler shown in the drawings has three sections.

The bottom section I5 is supported on the base or bracket I2, thecentral section I6 is spaced from the bottom section I5 to form a fluespace and the top or uppermost section Il is spaced from the centralsection to form a flue space, the flue spaces being identiiied by arrowsin Figure 4 at I8. The sections are set back from the casing at the endsto form ue ducts I9 and the smoke pipe 20 connects the heater with achimney.

Each section has a well 2l preferably at one end. The well is open tothe inside of the section. The top"wall of the section has an opening 22above the well. The sections also have openings 23 in the bottom wall atthe end opposite the well and arranged to be above the opening 22 of thenext lower section when the sections are assembled. The openings 22 and23 receive a tube or nipple 24 which serves as a water passage and alsoprovides space for a percolator tube.

The percolator tubes are placed in each well except the top one and areshown at 25. Each percolator tube has a base 26 with inlet spaces 21 andextends from one well to a point above the bottom of the next highersection and has a horizontal outlet 28. The tubes 24 that connect thesections extend above the bottom of the upper section of the two asshown at 29. This insures a water level on the bottom of each sectionand the overow passes over the rims 29 into the next lower section.

The feed pipe for supplying water vto the boiler is shown at 30, isprovided with a valve 3| and feeds water to the top-most section, thewater flowing down from one section to the other until the proper waterline in the bottom section is indicated on the gauge 32.

The top-most section has the opening 22 connected to the steam pipe 33and the return pipe from the steam system is shown at 34, connected tothe bottom section.

The top-most section has no percolator tube in its well which issupplied at its bottom part with a blow-oil pipe 35 provided with avalve 36.

In operation, the water in each section is converted into steam, whichaction is hastened by the steam and hot water passing up the percolatortubes and being deposited on the relatively shallow water in the nextupper section. This also insures water in such section, the hotter theboiler the more water is deposited through the percolator tubes.

The boiler may be made of cast metal but sheet steel is preferred as itis readily assembled,

-and brazed and welded connections can be made.

The flow of water from each section into its well 2l is free but theopening 23 is provided with a raised rim by any desired construction butthe preferred form is to extend the sleeve or tube 24 above the bottomof the section over which extension the water must pass in flowing backto the next lower section.

The water and steam in being carried up by the percolator tubes carriesimpurities and solids with it and these are deposited in the well 2| ofthe top-most section. This accumulation can be drained through theblow-ofi pipe 35.

The tubes 24, connecting the sections are large enough to allow a frepassage of steam and an unobstructed return flow of water .around theedges. The steam is aided in its flow toward the steam pipe 33 by theemissions from the percolator tube outlets which extend in the directionof natural ow of steam toward the pipe 33.

Various changes can be made in the construction and proportion of theparts without departing from the scope of this invention.

I claim:

1. A steam boiler comprising a series of horizontal sections arrangedone above the other in spaced relation and provided with wells, and withsteam openings comprising conduits above the wells connecting eachsection, the alternate sections being reversed relative to the otherspercolator tubes in the wells and extending through said steam openingsto deliver to the next higher section, the conduits having projectingrims on their top edges for insuring the presence of water in thesections.

2. A steam boiler comprising a series of horizontal sections arrangedone above the other in spaced relation and provided with wells, and withsteam openings comprising conduits above the wells connecting saidsections with the next higher section, the sections being arrangedalternately in reverse position percolator tubes in the wells andextending through said steam openings to deliver to the next highersection, the conduits having projecting rims on their top edges forinsuring the presence of water in the sections and a valved blow-offpipe extending to the outside of the boiler from the lower part of thewell of the top-most section.

3. A steam boiler comprising a series of horizontally arranged hollowsections, one above the other in spaced relation, each section having anopening in its top and a well below said opening, percolator tubes inthe Wells other than that of the 'top-most section, each section havingan opening in the bottom above the opening and Well in the section nextbelow, conduits connecting said top and bottom openings of adjacentsections the percolator tubes extending from a Well through suchconduits to the next section above and with its outlet arrangedhorizontally to project into the next section, the rim of each bottomopening being raised to insure the water level in each section above thebottom thereof and a feed water pipe for feeding water to the top-mostsection.

4. A steam boiler comprising a series of horizontally arranged hollowsections, one above the other, each section having an opening in its topand a well below said opening, percolator tubes in the Wells other thanthat of the top-most section, each section having an opening in thebottom above the opening and well in the section next below, conduitsconnecting said top and bottom openings of adjacent sections thepercolator tubes extending from a well through such conduits to the nextsection above and with its outlet arranged horizontally to project intothe next section, the rim of each bottom opening being raised to insurethe water level in each section above the bottom thereof, a feed waterpipe for feeding water to the top-most section and a valved blow-oilpipe extending from the lower part of the well of the top-most section.

5. In a steam boiler, a boiler section of fiat form with a well in thebottom at one end, an opening in the top wall above the well, and anopening in the bottom at the other end, the last mentioned openinghaving a raised rim.

CARL Z. ALEXANDER.

